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Finding the Fourth Proportional to 66,720.56, 92,072.92 and 36,505.76

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Solution

The fourth proportional to 66,720.56, 92,072.92 and 36,505.76 is: 50,377.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,720.56 : 92,072.92 = 36,505.76 : x
  2. Step 2: Convert to fraction form
    66,720.56/92,072.92 = 36,505.76/x
  3. Step 3: Cross multiply
    66,720.56x = 92,072.92 × 36,505.76
  4. Step 4: Simplify right side
    66,720.56x = 3,361,191,920.02
  5. Step 5: Solve for x
    x = 3,361,191,920.02/66,720.56
  6. Step 6: Final answer
    x = 50,377.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.